{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/broadcom/genet/bcmgenet.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "40c04abcbc34e3afe338f41dae851ecbd72852ac",
              "status": "affected",
              "version": "f48bed16a756f5bc0244acd581f61968f7d7c2a4",
              "versionType": "git"
            },
            {
              "lessThan": "7939ad3b4db9eadf45a64f0524f38337a9494672",
              "status": "affected",
              "version": "f48bed16a756f5bc0244acd581f61968f7d7c2a4",
              "versionType": "git"
            },
            {
              "lessThan": "89771ce4f8f67dcffae561b2ccac95c0f6e3aa01",
              "status": "affected",
              "version": "f48bed16a756f5bc0244acd581f61968f7d7c2a4",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "fb4ca2b4bc6712a6ad635df5b9b41131846589f9",
              "versionType": "git"
            },
            {
              "lessThan": "3.17",
              "status": "affected",
              "version": "3.16.50",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/broadcom/genet/bcmgenet.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.13"
            },
            {
              "lessThan": "4.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.59",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.59",
                  "versionStartIncluding": "4.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.13",
                  "versionStartIncluding": "4.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "4.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "3.16.50",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bcmgenet: unshare the skb before writing the control block\n\nbcmgenet stores first_cb, last_cb and bytes_sent in the skb control\nblock and reads them back on completion to free the skb and credit BQL.\nether_setup() leaves IFF_TX_SKB_SHARING set, so the stack can resubmit\na shared skb that is still in the ring. The next transmit overwrites\nlast_cb, so the earlier slots complete without crediting their bytes\nand BQL stalls the queue until the watchdog resets it.\n\nUnshare the skb before writing the control block.\n\nReproduce with pktgen in clone_skb mode, which hands the driver the same\nskb while earlier copies are still in the ring:\n\n  modprobe pktgen\n  pg=/proc/net/pktgen\n  echo \"add_device eth0\" \u003e $pg/kpktgend_0\n  echo \"dst_mac AA:BB:CC:DD:EE:FF\" \u003e $pg/eth0\n  echo \"dst 192.0.2.1\" \u003e $pg/eth0\n  echo \"clone_skb 8\" \u003e $pg/eth0\n  echo \"count 0\" \u003e $pg/eth0\n  echo start \u003e $pg/pgctrl \u0026\n  sleep 5\n  echo stop \u003e $pg/pgctrl\n  wait\n  cat /sys/class/net/eth0/queues/tx-0/byte_queue_limits/inflight\n\ninflight stays nonzero on the now idle queue. clone_skb 0 leaves it at\nzero."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-28T10:35:48.686Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/40c04abcbc34e3afe338f41dae851ecbd72852ac"
        },
        {
          "url": "https://git.kernel.org/stable/c/7939ad3b4db9eadf45a64f0524f38337a9494672"
        },
        {
          "url": "https://git.kernel.org/stable/c/89771ce4f8f67dcffae561b2ccac95c0f6e3aa01"
        }
      ],
      "title": "net: bcmgenet: unshare the skb before writing the control block",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-99192",
    "datePublished": "2026-10-28T10:35:48.686Z",
    "dateReserved": "2026-09-25T10:25:14.400Z",
    "dateUpdated": "2026-10-28T10:35:48.686Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}